/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMCompiler/RigVMAST.h
Returns the expression for a given subject. subjects include nodes and pins.
the expressoin for the given subject (or nullptr)
const [FRigVMExprAST](API\Plugins\RigVMDeveloper\RigVMCompiler\FRigVMExprAST) * GetExprForSubject ( const [FRigVMASTProxy](API\Plugins\RigVMDeveloper\RigVMCompiler\FRigVMASTProxy) & InProxy ) const